28173776164 has 6 divisors (see below), whose sum is σ = 49304108294. Its totient is φ = 14086888080.

The previous prime is 28173776161. The next prime is 28173776177. The reversal of 28173776164 is 46167737182.

It can be written as a sum of positive squares in only one way, i.e., 28173622500 + 153664 = 167850^2 + 392^2 .

It is not an unprimeable number, because it can be changed into a prime (28173776161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3521722017 + ... + 3521722024.

Almost surely, 2^28173776164 is an apocalyptic number.

It is an amenable number.

28173776164 is a deficient number, since it is larger than the sum of its proper divisors (21130332130).

28173776164 is a wasteful number, since it uses less digits than its factorization.

28173776164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7043444045 (or 7043444043 counting only the distinct ones).

The product of its digits is 2370816, while the sum is 52.

The spelling of 28173776164 in words is "twenty-eight billion, one hundred seventy-three million, seven hundred seventy-six thousand, one hundred sixty-four".